Electrostatic coating blade and method of electrostatic spraying. (Machine-translation by Google Translate, not legally binding)
An electrostatic blade is disclosed having a slot extending the length of the blade and leading from a central duct to an outlet. A surface made of non-conductive material extends in front of the outlet and terminates in a discharge edge which is spaced 0.05 to 4 mm from the slot outlet. In use, liq...
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Main Author | |
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Format | Patent |
Language | English Spanish |
Published |
01.06.1988
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Edition | 4 |
Subjects | |
Online Access | Get full text |
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Summary: | An electrostatic blade is disclosed having a slot extending the length of the blade and leading from a central duct to an outlet. A surface made of non-conductive material extends in front of the outlet and terminates in a discharge edge which is spaced 0.05 to 4 mm from the slot outlet. In use, liquid is passed from the duct along the slot to the outlet where it collects as a bead. An electrostatic field is applied between the liquid at the slot outlet and the object to be coated which draws liquid along the non-conductive surface in a tapering stream and further causing the liquid to be discharged from the edge. Because the stream of liquid reaching the discharge edge is very thin, very low liquid discharge rates can be achieved while still maintaining a uniform coating on the target object. (Machine-translation by Google Translate, not legally binding)
UNA CUCHILLA DE REVESTIMIENTO ELECTROSTATICO PARA APLICAR UN REVESTIMIENTO DE UN LIQUIDO SOBRE UN OBJETO. SE DESCRIBE UNA CUCHILLA ELECTROSTATICA QUE TIENE UNA RANURA (16) QUE SE EXTIENDE A LO LARGO DE LA CUCHILLA Y VA DESDE UN CONDUCTO CENTRAL (14) A UNA SALIDA (18). UNA SUPERFICIE (20) HECHA DE UN MATERIAL NO CONDUCTOR SE EXTIENDE DELANTE DE LA SALIDA (18) Y TERMINA EN UN BORDE DE DESCARGA (22) QUE ESTA SEPARADO DE 0,05 A 4 MM DE LA SALIDA (18) DE LA RANURA. EN LA PRACTICA, SE PASA LIQUIDO DESDE EL CONDUCTO (14) A LO LARGO DE LA RANURA (16) A LA SALIDA (18), DONDE SE RECOGE EN FORMA DE PERLA. SE APLICA UN CAMPO ELECTROSTATICO ENTRE EL LIQUIDO Y LA SALIDA (19) DE RANURA Y EL OBJETO A REVESTIRSE, EL CUAL ATRAE LIQUIDO A LO LARGO DE LA SUPERFICIE NO CONDUCTORA (20) EN UNA CORRIENTE AHUSADA Y HACE, ADEMAS, QUE EL LIQUIDO SE DESCARGUE DEL BORDE (22). COMO ES MUY FINA LA CORRIENTE DE LIQUIDO QUE LLEGA AL BORDE DE DESCARGA, PUEDEN LOGRARSE VELOCIDADES MUY BAJAS DE DESCARGA DE LIQUIDO, MANTENIENDO AL MISMO TIEMPO UN REVESTIMIENTO UNIFORME EN EL OBJETO OBJETIVO. |
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Bibliography: | Application Number: ES19860001572 |